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golang日志框架zap简洁配置

2020-03-21  本文已影响0人  a8fba23d85b2

golang日志框架zap简洁配置

$ 前言

$ 配置目标

源码

package base

import (
    "fmt"
    rotatelogs "github.com/lestrrat-go/file-rotatelogs"
    "go.uber.org/zap"
    "go.uber.org/zap/zapcore"
    "io"
    "os"
    "time"
)

var Log *zap.SugaredLogger

const (
    output_dir = "./logs/"
    out_path   = "foot.log"
    err_path   = "foot.err"
)

func init() {
    _, err := os.Stat(output_dir)
    if err != nil {
        if os.IsNotExist(err) {
            err := os.Mkdir(output_dir, os.ModePerm)
            if err != nil {
                fmt.Printf("mkdir failed![%v]\n", err)
            }
        }
    }

    // 设置一些基本日志格式 具体含义还比较好理解,直接看zap源码也不难懂
    encoder := zapcore.NewConsoleEncoder(zapcore.EncoderConfig{
        MessageKey: "msg",
        LevelKey:   "level",
        TimeKey:    "ts",
        //CallerKey:      "file",
        CallerKey:     "caller",
        StacktraceKey: "trace",
        LineEnding:    zapcore.DefaultLineEnding,
        EncodeLevel:   zapcore.LowercaseLevelEncoder,
        //EncodeLevel:    zapcore.CapitalLevelEncoder,
        EncodeCaller: zapcore.ShortCallerEncoder,
        EncodeTime: func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
            enc.AppendString(t.Format("2006-01-02 15:04:05"))
        },
        //EncodeDuration: zapcore.SecondsDurationEncoder,
        EncodeDuration: func(d time.Duration, enc zapcore.PrimitiveArrayEncoder) {
            enc.AppendInt64(int64(d) / 1000000)
        },
    })

    // 实现两个判断日志等级的interface
    infoLevel := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
        return true
    })

    warnLevel := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
        return lvl >= zapcore.WarnLevel
    })

    // 获取 info、warn日志文件的io.Writer 抽象 getWriter() 在下方实现
    infoHook_1 := os.Stdout
    infoHook_2 := getWriter(out_path)
    errorHook := getWriter(err_path)

    // 最后创建具体的Logger
    core := zapcore.NewTee(
        zapcore.NewCore(encoder, zapcore.AddSync(infoHook_1), infoLevel),
        zapcore.NewCore(encoder, zapcore.AddSync(infoHook_2), infoLevel),
        zapcore.NewCore(encoder, zapcore.AddSync(errorHook), warnLevel),
    )

    // 需要传入 zap.AddCaller() 才会显示打日志点的文件名和行数, 有点小坑
    logger := zap.New(core, zap.AddCaller(), zap.AddStacktrace(zap.ErrorLevel))
    Log = logger.Sugar()
    defer logger.Sync()
}

func getWriter(filename string) io.Writer {
    // 生成rotatelogs的Logger 实际生成的文件名 demo.log.YYmmddHH
    // demo.log是指向最新日志的链接
    // 保存7天内的日志,每1小时(整点)分割一次日志
    hook, err := rotatelogs.New(
        // 没有使用go风格反人类的format格式
        output_dir+filename+".%Y%m%d",
        rotatelogs.WithLinkName(filename),
        rotatelogs.WithMaxAge(time.Hour*24*7),
        rotatelogs.WithRotationTime(time.Hour*24),
    )
    if err != nil {
        panic(err)
    }
    return hook
}

使用

package main

import "tesou.io/platform/foot-parent/foot-api/common/base"

func main() {
    base.Log.Info("日志1")
    base.Log.Info("日志2")
    base.Log.Error("错误的日志")
    base.Log.Info("日志3")

}
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